多个字符串中查找某个字符

编写一个独立函数在多个字符串中查找某个字符，并判断该字符最先出现在哪个字符串中。
注：函数原型 int fun(char **,int n,char);

#include <stdio.h>

int find_char(char **strings, int n, char c) {
    int i, j;
    for (i = 0; i < n; i++) {
        for (j = 0; strings[i][j]; j++) {
            if (strings[i][j] == c) {
                return i;
            }
        }
    }
    return -1;
}

int main() {
    char *strings[] = {"hello", "world", "goodbye"};
    int n = sizeof(strings) / sizeof(strings[0]);
    char c = 'o';

    int index = find_char(strings, n, c);
    if (index != -1) {
        printf("Character '%c' found in string %d: %s\n", c, index, strings[index]);
    } else {
        printf("Character '%c' not found in any strings\n", c);
    }
    return 0;
}